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package org.apache.qpid.example.amqpexample.pubsub;
import org.apache.qpid.nclient.Client;
import org.apache.qpid.nclient.Connection;
import org.apache.qpid.nclient.Session;
import org.apache.qpid.transport.DeliveryProperties;
import org.apache.qpid.transport.Header;
import org.apache.qpid.transport.MessageAcceptMode;
import org.apache.qpid.transport.MessageAcquireMode;
public class TopicPublisher
{
public void publishMessages(Session session, String routing_key)
{
// Set the routing key once, we'll use the same routing key for all
// messages.
DeliveryProperties deliveryProps = new DeliveryProperties();
deliveryProps.setRoutingKey(routing_key);
for (int i=0; i<5; i++) {
session.messageTransfer("amq.topic", MessageAcceptMode.EXPLICIT, MessageAcquireMode.PRE_ACQUIRED,
new Header(deliveryProps), "Message " + i);
}
}
public void noMoreMessages(Session session)
{
session.messageTransfer("amq.topic", MessageAcceptMode.EXPLICIT, MessageAcquireMode.PRE_ACQUIRED,
new Header(new DeliveryProperties().setRoutingKey("control")),
"That's all, folks!");
}
public static void main(String[] args)
{
// Create connection
Connection con = Client.createConnection();
try
{
con.connect("localhost", 5672, "test", "guest", "guest");
}
catch(Exception e)
{
System.out.print("Error connecting to broker");
e.printStackTrace();
}
// Create session
Session session = con.createSession(0);
// Create an instance of the listener
TopicPublisher publisher = new TopicPublisher();
publisher.publishMessages(session, "usa.news");
publisher.publishMessages(session, "usa.weather");
publisher.publishMessages(session, "europe.news");
publisher.publishMessages(session, "europe.weather");
// confirm completion
session.sync();
//cleanup
session.sessionDetach(session.getName());
try
{
con.close();
}
catch(Exception e)
{
System.out.print("Error closing broker connection");
e.printStackTrace();
}
}
}
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